2516720513 has 4 divisors (see below), whose sum is σ = 2626143168. Its totient is φ = 2407297860.

The previous prime is 2516720491. The next prime is 2516720533. The reversal of 2516720513 is 3150276152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2516720513 - 2⁸ = 2516720257 is a prime.

It is a super-3 number, since 3×2516720513³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2516720513.

It is not an unprimeable number, because it can be changed into a prime (2516720533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54711293 + ... + 54711338.

It is an arithmetic number, because the mean of its divisors is an integer number (656535792).

Almost surely, 2^2516720513 is an apocalyptic number.

2516720513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2516720513 is a deficient number, since it is larger than the sum of its proper divisors (109422655).

2516720513 is a wasteful number, since it uses less digits than its factorization.

2516720513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109422654.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 2516720513 is about 50166.9264854844. The cubic root of 2516720513 is about 1360.2278512778.

Adding to 2516720513 its reverse (3150276152), we get a palindrome (5666996665).

The spelling of 2516720513 in words is "two billion, five hundred sixteen million, seven hundred twenty thousand, five hundred thirteen".